Rotary printing press



Filed Dec. 1, 1928 3 Sheets-Sheet l i INVENTOR ATTORNEYS Feb. 11, 1930. H. M. BARBER 1,746,812

ROTARY PRINTING PRES 5 Filed Dec. 1, 1928 3 SheetsSheet 2 INVENTQR flm Z4, 71%,

ATTORN EYS Feb. 11, 1930. H. M. BARBER ROTARY PRINTING PRES 5 Filed Dec. 1, 1928 3 Sheets-Sheet 3 INVENTOR ATTORNEYS Patented F eb. 11, 1930 UNITED STATES PATENT OFFICE HOWARD M. BARBER, OF IAWCATUCK,

CONNECTICUT, ASSIGNOR TO 0. B. GOTTRELL &

SONS COMPANY, OF WESTERLY, RHODE ISLAND, A CORPORATION OF DELAWARE ROTARY PRINTING PRESS Application filed December 1, 1928. Serial No. 323,038.

In multicolor rotary printing presses it is usual to provide a brush which is moved into and out of coaction with the impression cylinder for laying the successively fed sheets smoothly thereon before they pass under the form cylinders to be printed. It is usual to bring this brush into contact with each sheet just after the advance edge of the sheet has passed the brush, so that the brush will not muss or tear the sheet along its advance edge.

In rotary printing presses of this type in which means, operated when the sheet feeder fails to present a sheet, are provided for antomatically causing the impression cylinder grippers to remain closed on the printed sheet beyond its delivery point, it is necessary that the brush should not be brought into its operative position in contact with the said freshly printed sheet as such contact would cause the ink on the sheet to be transferred to the brush, so that when the press again starts the so-inlted brush would smear and ruin a considerable number of successively fed sheets.

The object of my invention therefore, to provide means, operated by the failure of the sheet feeder to present a sheet for not only 'ausing the impression cylinder grippers to retain the freshly printed sheet on the impression cylinder beyond its delivery point to protect the cylinder blanket, but also for holding the brush in its inoperative position out of contact with said freshly printed sheet. the brush being locked in such inoperative position until it is released by the manually operated means for causing the resetting of the gripper operating cams.

In the accompanying drawings I have :hown my invention as applied to the sheet feeder controlled gripper mechanism set forth and claimed in my copending application, filed October 26th. 1928, Serial No. 315,304.

Fig. 1 of the drawings represents a detail side elevation showing so much of a rotary printing press of the type set forth. as will give a clear understanding of my invention; the parts being in their normal operative positions.

Fig. 2 represents a similar elevation with the parts in the positions they assume when the sheet feeder has failed to present a sheet to the feeding cylinder grippers.

Fig. 3 represents a fragmentary view showing the brush locked in its inoperative position after the high part of the brush operating cam has moved past the stud or roller on the brush lever arm.

Fig. 4 represents a detail end elevation with the parts in the positions shown in Fig. 1.

The impression cylinder of press is denoted by 1, its shaft by 2 and its sheet grippers by 3. The sheet feeding cylin der is denoted by 4, its shaft by 5 and its sheet grippers by 6. The sheet delivery cylinder is denoted by 7, its shaft by 8 and its sheet grippers by 9.

The impression cylinder gripper operating cam 10 is pivoted at 11 so that it may be swung into and out of its normal operative position in the path of the spring pressed gripper operating lever 12 for controlling the operation of the impression cylinder grippers 3. both at their receiving point from the sheet feeding cylinder grippers 6 and also at their delivery point to the delivery cylinder grippers 9.

The delivery cylinder gripper operating cam 13 is pivoted at 14 so that it may be swung into and out of its normal operative position in the path of the spring pressed gripper operating lever 15 for controlling the operation of the delivery cylinder grippers 9 at their receiving point from the impression ('yiinder grippers 3.

These movable gripper controlling cams 10 and 13 are interconnected through the two armed rock lever 16, 17 and rods 18. 19 to move together into and out of their operative positions.

The spring pressed tumbler cam 20 carried by the grippers 6 of the sheet feeding cylinder 4 is operated by the usual tumbler operating pin 21 at their sheet receiving point to close the grippers on a sheet as it is fed in by an automatic sheet feeder of any well known or approved form, the portions which are shown in the accompanying drawings being denoted by 22. This tumbler cam the printing LLPIA. 010.0

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wise out of the path of the feeding cylinder gripper tumbler cam 20 and the tumbler pin endwise into the said path so that the feeding cylinder grippers will not be opened until they have passed their transfer point to the impression cylinder gripiers, thus pro tecting the advance edge of the freshly printed sheet held on the impression cylinder from becoming so torn or otherwise mutilated by the feeding cylinder grippers as to prevent it from being sidisequently delivered when the press is again started. This inward swinging movement of the cam 10 will permit the latch 52, 54 to swing under the influence of its spring 56 to bring the arm 52 into locking engagement vith the brush lever arm 50 and thereby lock the brush 42 in its inoperative position out of contact with the freshly printed sheet on the inniression cylinuer; it being understood that the brush has already been moved to this position by the contact of the high part of the cam 48 n i'iih the stud or roller 47 on the brush lever arm it It will be seen that as the high part of lhe cam leaves the stud or roller 42', the iatch arm 52, because of its engagement: with the brush lever arm 50, will. prevent the b ush from swinging back under the influence of its spring 49. into contact with the freshly printed sheet retained on the impression cylinder.

The means which I have shown for restoring the parts to their operative positions is hand lever 57 fast on the shaft 33. This lever may be swung to rock the cams 10 and 13 back into the paths of their 1' ve gripper operating levers. At the same time the cam it) because of its engagement with the adjustable stop 55 will. in its outward movement, unlock the arm 52 of the latch 54, thereby releasing the brush lever 50 and permitting the stud or roller 7 to swing into contact with its open. i j rain 48.

will be understood at the in-sens controlling the moveme;

is of the grippon the feeding. impression and deli (1y! ders forms the subject matter of my roper Eng application hereinabve referred to. the present application being dire-"ted to t means for locking the sheet smoothing devire in its inoperative position when the feeder fails to present a sheet, a :o to the in: are operated means for unlocking the device before restarting the press.

It is evident that v rious changes may be resorted to in the construction. form and arrangcn'ient of the several parts without departing from the spirit and scope of my invention, hence I do not wish to be limited to the particular embodiment herein shown and described, but

What I claim is 1. In a rotary printing press equipped with a sheet feeder, an impression cylii'n'ler, a sheet smoothing device, means for movii it and out of its operative position and means, operable when the feeder fails to present a sheet, for locking the said device in its inoperative position.

2. In a rotary printing press equipped with a sheet feeder, an impression cylinder, :1 sheet smoothing device, means for moving it into and out of its operative position, means, operable when the feeder fails to present a sheet, for locking the said device in its inoperative position, and manually operated means for unlocking the sheet smoothing delife.

3. In a rotary printing press equipped with a sheet feeder having a throw-off mechanism, an impression cylinder, a sheet smoothing de vice, means for moving it into and out of its operative position and means. actuated i the throw-off mechanism when the feeder na ls to present a sheet, for locking the said device in its inoperative position.

In a rotary printing press equipped with 1 sheet feeder having a throw-off mechanism, 1 in'ipression cylinder, a sheet smoothing de vice, means for moving it into and out of its operative position, means, actuated by the ;l:rowoti" mechanism when the feeder fails to present a sheet, for locking the said device in its inoperative position, and manually op tinted means for unlocking the sheet smooth 1 device. .3. In a rotary printing press equipped with a :heet feeder, an impression cylinder, a sheet 1?? nothin device, means for n'ioving it into and out of its operative position and means, operable when the feeder fails to present a sheet, for causing the impression cylinder to rciain the freshly printed sheet thereon beyend its delivery point and also for locking the said device in its inoperative position.

it. In a rotary printing press equipped with with a sheet feeder, an impression cylinder, a sheet smoothing device, means for moving it into and out of its operative position. means, operable when the feeder fails to pres 'nt a sheet, for causing the impression cylinner to retain the freshly printed sheet i hereon beyond its delivery point and also for locking the said device in its inoperative position, and manually operated means for unlocking the sheet smoothing device.

7. In a rotary printing press equipped with a ;-heet feeder having a throw-off mechanism, an impression cylinder, a sheet smoothing device, means for moving it into and out of its operation position and means. actuated the throw-off mechanism when the feeder fi. c to present a sheet, for causing the impression cylinder to retain the freshly printed sheet thereon beyond its delivery point and also for locking the said device in its inoperative position.

8. In a rotary printing press equipped with a sheet feeder having a throw-off mechanism, an impression cylinder, a sheet smoothing device, means for moving it into and out of its operative position means, actuated by the throw-off mechanism when the feeder fails to present a sheet, for causing the impression cylinder to retain the freshly printed sheet thereon beyond its delivery point and also for locking the said device in its inoperative position, and manually operated means for unlocking the sheet smoothing device.

In rotary printing press equipped with a sheet feeder, an impression cylinder, its grippers. a sheet smoothing device, means for ioving itinto and out of its operative posilion and means, operable when the feeder fails to present a sheet, for causing the impression cylinder grippers to retain the freshly printed sheet on the cylinder lie -fond its delivery point and also for locking the said device in its inoperative position.

10. In a rotary printing press equipped with a sheet feeder, an impression cylinder, its grippers, a sheet smoothing device, means for moving it into and out of its operative position means, operable when the feeder fails to present a sheet, for causing the impression cylinder grippers to retain the freshly printed sheet on the cylinder beyond its delivery point and also for locking the said device in its inoperative position, and manually operated means for unlocking the sheet smoothing device.

11. In a rotary printing press equipped with a sheet feeder having a throw-off mechanism, an impression cylinder, its grippers, a sheet smoothing device, means for moving it into and out of its operative position and means, actuated by the throw-off mechanism when the feeder fails to present a sheet, for causing the impression cylinder grippers to retain the freshly printed sheet on the cylinder beyond its delivery point and also for locking the said device in its operative position.

12. In a rotary printing press equipped with a sheet feeder having a throw-off meclh anism, an impression cylinder, its grippers, a sheet smoothing device, means for moving it into and out of its operative position, means actuated by the throw-off mechanism when the feeder fails to present a sheet, for causing the impression cylinder grippers to retain the freshly printed sheet on the cylinder beyond its delivery point and also for locking the said device in its operative position, and manually operated means for unlocking the sheet smoothing device.

13. In a rotary printing press equipped with a sheet feeder, an impression cvlinder, its grippers, a controlling cam therefor movable into and out of its operative position, a latch normally locking said cam in its operative position, a sheet smoothing device, means for moving it into and out of its operative position, a latch for locking said device in its inoperative position and means, operable when the feeder fails to present a sheet, for moving the first named latch out of its locking position to permit the cam to move to its inoperative position and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position.

14. In a rotary printing press equipped with a sheet feeder, an impression cylinder, its grippers, a controlling cam therefor movable into and out of its operative position, a latch normally locking said cam in its operative position, a sheet smoothing device, means for moving it into and out of its operative posi. ion, a latch for locking said device in its inoperative position and means, operable when th feeder fails to present a sheet. for moving f rst named latch out of its locking posi to permit the cam to move to its inoperati -.o position and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position, and a common manually operated means for returning the latches to their original positions.

15. In a rotary printing press equipped with a sheet feeder having a throw-off mechanism, an impression cylinder, its grippers, a cimtrolling cam therefor movable into and out of its operative position, a latch normally locking said cam in its operative position, a sheet smoothing device, means for movin g it into and out of its operative position, a latch for locking said device in its inoperative position and means, actuated by the throw-off mechanism when the feeder fails to present a sheet, for moving the first named latch out of its locking position to permit the cam to move to its inoperative position and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position.

it In a rotary printing press equipped with a sheet feeder having a throw-off mechanism, an impression cylinder, its grippers, a controlling cam therefor movable into and out of its operative position, a latch normally locking said am in its operative position, a sheet smoothing device, means for moving it into and out of its operative position, a latch for locking said de ice in its inoperative position means, actuated by the throwof? mechanism when the feeder fails to present a sheet, for moving t ie first named latch out of its locking position to permit the cam to move to its inoperative position and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position, and a common manually operated means for returning the latches to their original positions.

17. In a rotary printing press equipped with a sheet feeder, sheet feeding, impression and delivery cylinders, their grippers, controlling cams for said grippers movable into and out of their operative positions, a latch normally locking said cams in their operative positions, a sheet smoothing device, means for moving it into and out of its operative position, a latch for locking said device in its inoperative position and means, operable when the feeder fails to present a sheet, for moving the first named latch out of its locking position to permit the cams to move to their inoperative positions and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position.

18. In a rotary printing press equipped with a sheet feeder, sheet feeding, impression and delivery cylinders, their grippers, controlling cams for said grippers movable into and out of their operative positions, a latch normally lockin said cams in their operative positions, a sheet smoothing device, means for moving it into and out of its operative position, a latch for locking said device in its inoperative position, means, operable when the feeder fails to present a sheet, for moving the first named latch out of its locking position to permit the cams to move to their inoperative positions and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position, and a common manually operated means for returning the latches to their original positions.

19. In a rotary printing press equipped with a sheet feeder having a throw-off mechanism, sheet feeding, impression and delivery cylinders, their grippers, controlling cams for said grippers movable into and out of their operative positions, a latch normally locking said cams in their operative positions, a sheet smoothing device, means for moving it into and out of its operative position, a latch for locking said device in its inoperative position, and means, actuated by the throw-off mechanism when the feeder fails to present a sheet, for moving the first named latch out of its locking position, to permit the cams to move to their inoperative positions and also for moving, the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position.

20. In a rotory printing press equipped with a sheet feeder having a throw-off mech anism, sheet feeding, impression and delivery cylinders, their grippers, controlling cams for said grippers movable into and out of their operative positions, a latch normally locking said cams in their operative positions, a sheet smoothing device, means for moving it into and out of its operative position, a latch for locking said device in its inoperative position, means, actuated by the throw-off mechanism when the feeder fails to present a sheet, for moving the first named latch out of its locking position, to permit the cams to move to their inoperative positions and also for moving the second named latch into its locking position, to hold the sheet smoothing device in its inoperative position, and a common manually operated means for returning the latches to their original positions. In testimony, that I claim the foregoing my invention, I have signed my name this 28th day of November, A. D. 1928.

HOIVARD M. BARBER. 

